NS incompatible with devel generate? Getting errors when using it

When I try to generate some articles (so I've only selected the 'article' content type when generating) with devel generate, I get the following error:

Notice: Undefined index: und in ns_article_node_presave() (line 15 of /home5/hehenkam/public_html/ns2/profiles/nodestream/modules/ns_core/features/ns_article/ns_article.module).
Notice: Undefined index: und in ns_article_node_presave() (line 16 of /home5/hehenkam/public_html/ns2/profiles/nodestream/modules/ns_core/features/ns_article/ns_article.module).
PDOException: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'field_ns_article_media_display' cannot be null: INSERT INTO {field_data_field_ns_article_media} (entity_type, entity_id, revision_id, bundle, delta, language, field_ns_article_media_fid, field_ns_article_media_display, field_ns_article_media_description) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8); Array ( [:db_insert_placeholder_0] => node [:db_insert_placeholder_1] => 34 [:db_insert_placeholder_2] => 37 [:db_insert_placeholder_3] => ns_article [:db_insert_placeholder_4] => 0 [:db_insert_placeholder_5] => und [:db_insert_placeholder_6] => 22 [:db_insert_placeholder_7] => [:db_insert_placeholder_8] => ) in field_sql_storage_field_storage_write() (line 448 of /home5/hehenkam/public_html/ns2/modules/field/modules/field_sql_storage/field_sql_storage.module).

Is this a known problem? It's quite some work to fill up a website when you need to demo it for a client, so devel generate is a huge time-saver. Any alternative modules if devel generate doesn't work for this?